So I beat the campaign to be highly disappointed that the flood didn’t return, but in the gameplay where is the different faction leaders like Promethean,Covenant,Flood etc. I have to admit it makes me highly saddened that the lore to halo didn’t follow up as much as it should have. I’m still hoping this problem is fixed with the season pass. If not you lost a true Halo fan.
I think I heard somewhere that they’re gonna be releasing new leader DLC (Like they did with Sgt. Forge) as the game’s lifespan goes on. This could open the door to new factions coming in, which I agree in the thought that they would be a cool idea. However, I’m not sure if it has been officially confirmed, so take it with a grain of salt.